Demountable multi-purpose exercise device

ABSTRACT

A demountable multi-purpose exercise device including a pair of elongate plunger members, a central guide member having a pair of oppositely disposed portions for demountable telescopic engagement with the pair of elongate plunger members. Further included is a depressible resilient means disposed between the pair of elongate plunger members and the central guide member, operative to permit mutual contraction of the plunger members in response to opposing axial forces applied thereto. There is an elongate flexible member longitudinally looped about the exercise device in engagement with the pair of elongate plunger members. Further, there are included, for use with the exercise device an exercise apparatus comprising retractable spool members in cylindrical casings and elongate flexible members fixably attached and resiliently coiled about the spool members to be uncoiled in response to a force applied thereto.

FIELD OF THE INVENTION

[0001] The present invention relates, generally to an exercise device and, more specifically, to an exercise device, which can be easily disassembled.

BACKGROUND OF THE INVENTION

[0002] It is known in the art to provide exercise devices to facilitate exercises to promote or maintain physical fitness, generally for human use. These devices fall into two broad categories, namely, portable and non-portable. The latter include items, which are portable simply by virtue of their physical size or weight. However, these are generally limited in the scope of exercises which can be performed by their use.

[0003] Referring now to U.S. Pat. No. 3,268,225 to Kolbel, on Aug. 23, 1966, entitled “Spring Type Physical Exerciser,” there is disclosed an exercising device having an internal telescopic tube, slidable within an external tube and having a spring disposed within the tubes. The external extremity of each tube has a handle affixed thereto, which acts as a closure to support the spring therewithin. By pressing on both handles, exercises requiring a pushing or compressing effort may be performed. An endless rope-like loop passes through recesses formed in each handle and is fixed thereto, such that the tubes are maintained somewhat under tension with respect to each other and to the spring. The rope may be provided with two handles formed or fixed thereto, disposed on either side of the telescopic tubes to facilitate exercises that require a pulling or expanding movement or effort. The rope also prevents the tubes and handles from springing apart.

[0004] The abovementioned device, while providing features for performing multiple exercises, is portable only to a limited extent. Being, of necessity, a lengthy device having a fixed assembly of its component parts, it is not intended for quick and convenient disassembly to facilitate compact packing and transporting, and for quick subsequent re-assembly for use.

SUMMARY OF THE INVENTION

[0005] The present invention aims to provide a lightweight, demountable, multi-purpose, exercise device, which is easily assembled for use and disassembled for convenience of packing or for conveying while the user is travelling. The multi-purpose exercise device is usable, generally but not exclusively, by humans for performing a wide variety of exercises, including the actions of compressing, pulling, pushing, expanding or drawing apart.

[0006] According to a preferred embodiment of the present invention, there is provided a demountable multi-purpose exercise device including a pair of elongate plunger members, each having a first end portion and a second end portion. The exercise device also includes a central guide member having a pair of oppositely disposed portions for demountable telescopic engagement with the second end portions of the pair of elongate plunger members. Further included is a depressible resilient means disposed between the pair of elongate plunger members and the central guide member, operative to permit mutual contraction of the plunger members in response to opposing axial forces of at least a predetermined magnitude applied thereto via the first ends thereof.

[0007] According to a first embodiment of the present invention, the demountable multi-purpose exercise device also includes an elongate flexible member operative to be longitudinally looped about the remainder of the exercise device in engagement with the first end portions of the pair of elongate plunger members. The elongate flexible member is configured to be of a length so as to retain the pair of plunger members in engagement with the central guide member.

[0008] According to a variation of the embodiment of the present invention, the demountable multi-purpose exercise device also includes means for selectably fastening the elongate flexible member to the first end portions of the pair of elongate plunger members.

[0009] According to another variation of the embodiment of the present invention, the flexible member is formed as a continuous, endless loop.

[0010] According to a further variation of the embodiment of the present invention, the elongate flexible member is formed as a pair of elongate flexible elements.

[0011] According to an added variation of the embodiment of the present invention, the elongate flexible member is arranged to be demountably engaged to the first end portions of the plunger members such that, applying a transverse force to the flexible member, the elongate flexible member is operative to apply opposing axial forces to the first end portions of the elongate plunger members to permit mutual contraction of the plunger members.

[0012] According to a second embodiment of the present invention, the elongate flexible member includes at least one handhold disposed along a portion of the elongate flexible member, and affixed thereto, thereby to provide a means for gripping the elongate flexible member.

[0013] According to a third embodiment of the present invention, the elongate flexible member includes attached thereto an extended elongate flexible element so as to attach the extended elongate flexible element to a user's limbs.

[0014] According to a fourth embodiment of the present invention, the first end portions of the elongate plunger members have handle elements disposed at the first end portions thereof, so as to facilitate a user applying opposing axial forces to the first end portions of the elongate plunger members.

[0015] According to a fifth embodiment of the present invention, the depressible resilient means includes one or more resilient means selected from one or more helical springs; one or more pairs of concave resilient washers disposed in an opposing arrangement; resilient foam polymer material; and a gas filled resilient container.

[0016] According to a sixth embodiment of the present invention, the depressible resilient means is disposed in at least one arrangement selected from within one or both of the plungers or the guide member, or external to one or both of the plungers or the guide member.

[0017] According to another preferred embodiment of the present invention, there is provided a demountable multi-purpose exercise device including an elongate plunger member, having a first end portion and a second end portion. There is also included a guide member having a first end portion and a second end portion oppositely disposed such that the second portion is formed for demountable telescopic engagement with the second end portion of the elongate plunger member. Further there is a depressible resilient means provided between the elongate plunger member and the guide member, operative to permit mutual contraction of the elongate plunger member and the guide member in response to opposing axial forces applied thereto via the first end portion of the plunger member and the first portion of the guide member.

[0018] According to a seventh embodiment of the present invention, the demountable multi-purpose exercise device also includes an elongate flexible member operative to be longitudinally looped about the remainder of the exercise device in engagement with the first end portions of the elongate plunger member and the guide member, and configured to be of a length so as to retain the pair of plunger members in engagement with the central guide member.

[0019] According to a variation of the embodiment of the present invention, the demountable multi-purpose exercise device also includes means for selectably fastening the elongate flexible member to the first end portions of the elongate plunger member and the central guide member.

[0020] According to another variation of the embodiment of the present invention, the flexible member is formed as a continuous, endless loop.

[0021] According to an added variation of the embodiment of the present invention, the flexible member is formed as a pair of flexible elements.

[0022] According to a further variation of the embodiment of the present invention, the elongate flexible member is arranged to be demountably engaged to the first end portion of the elongate plunger member and the first portion of the guide member such that, applying a transverse force to the elongate flexible member, the elongate flexible member is operative to apply opposing axial forces to the first portion of the elongate plunger member and to the first portion of the guide member to permit mutual contraction of the elongate plunger member and the guide member.

[0023] According to an eighth embodiment of the present invention, the elongate flexible member includes at least one handhold disposed along a portion of the elongate flexible member, and affixed thereto, thereby to provide a means for gripping the elongate flexible member.

[0024] According to a variation of the embodiment of the present invention, the elongate flexible member includes attached thereto an extended elongate flexible element so as to attach the extended elongate flexible element to a user's limbs.

[0025] According to a ninth embodiment of the present invention, the first end portion of the elongate plunger member and the first portion of the guide member have handle elements disposed at the first end portions of the elongate plunger member and the first portion of the guide member, so as to facilitate a user applying opposing axial forces to the first end of the elongate plunger member and to the first portion of the guide member.

[0026] According to a tenth embodiment of the present invention, the depressible resilient means includes one or more resilient means selected from one or more helical springs; one or more pairs of concave resilient washers disposed in an opposing arrangement; resilient foam polymer material or gas filled resilient containers.

[0027] According to an eleventh embodiment of the present invention, the depressible resilient means is disposed in one or more arrangement selected from within the elongate plunger or guide member or external to the elongate plunger or the guide member.

[0028] According to a further preferred embodiment of the present invention, there is provided an exercise apparatus for use with a demountable multi-purpose exercise device. The demountable multi-purpose exercise device includes a pair of elongate plunger members and a guide member arranged for mutual, relative, resilient contraction along a common axis. The exercise apparatus includes one or more retractable spool members rotationally mounted within a substantially cylindrical casing having a cylindrical axial mounting opening formed therethrough. The exercise apparatus further includes one or more elongate flexible members fixably attached by a first end thereof to one or more spool members. The elongate flexible members are arranged to be resiliently coiled about spool members and adapted to be uncoiled in response to a force greater than a resistance force applied thereto via the spool member. One or more retractable spools are operative to recoil one or more elongate flexible members thereabout in the absence of a force greater than the resistance force.

[0029] According to a twelfth embodiment of the present invention, one or more of the exercise apparatus is demountably disposed on a guide member.

[0030] According to a thirteenth embodiment of the present invention, the exercise apparatus includes a brake element disposed thereon so as to apply a preselected resistance force to the retractable spool member.

BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be more fully understood and its features and advantages will become apparent to those skilled in the art by reference to the ensuing description, taken in conjunction with the accompanying drawings, in which:

[0032]FIG. 1 is a partial cross-sectional view of a demountable exercise device, according to a preferred embodiment of the present invention;

[0033]FIG. 2 is a perspective view of the demountable exercise device of FIG. 1;

[0034]FIG. 3 illustrates a cross-sectional view of a central guide member of the demountable exercise device of FIG. 1;

[0035]FIG. 4 illustrates a plunger member of the demountable exercise device of FIG. 1;

[0036]FIG. 5 is a perspective view of a base portion of a handle element of the plunger of FIG. 4;

[0037]FIG. 6 is a perspective view of a base portion and a handhold portion of the handle element of the plunger member of FIG. 4;

[0038]FIG. 7 illustrates a flexible member or cord, in accordance with an embodiment of the present invention;

[0039] FIGS. 8 illustrates a partial cross-sectional view, in accordance with a further embodiment of the present invention, of an alternative flexible member formed as a single length cord attached to a demountable exercise device;

[0040] FIGS. 9 illustrates a partial cross-sectional view, in accordance with another embodiment of the present invention, of an alternative flexible member formed of cords attached to a demountable exercise device;

[0041]FIGS. 10 and 11 illustrate a cross-sectional partial view of a guide tube having a collar attachment means to accommodate plungers;

[0042]FIG. 12 illustrates a central guide member having collar attachment means at each end;

[0043]FIGS. 13 and 14 illustrate alternative resilient means according to additional embodiments of the present invention;

[0044]FIG. 15 illustrates a demountable exercise device according to another preferred embodiment of the present invention;

[0045]FIG. 16 illustrates a demountable attachment of the demountable exercise device of FIG. 1 to a chair leg;

[0046]FIG. 17 illustrates an ankle attachment strap for use with the exercise device demountably attached to a chair leg;

[0047]FIG. 18 illustrates an alternative flexible member for use with the exercise device demountably attached to a chair leg;

[0048]FIG. 19 illustrates a leg exercise using the demountable exercise device as seen in FIGS. 16-18.

[0049]FIG. 20 illustrates a pre-assembly view of a demountable retractable exercise apparatus for use with a demountable multi-purpose exercise device;

[0050]FIG. 21 illustrates an assembly view of the demountable retractable exercise apparatus with a demountable multi-purpose exercise device;

[0051]FIG. 22 illustrates a view of the demountable retractable exercise apparatus for use with a demountable multi-purpose exercise device; and

[0052]FIG. 23 illustrates the demountable retractable exercise apparatus as shown in FIG. 21 used for a rowing exercise.

DETAILED DESCRIPTION OF THE INVENTION

[0053] At present, many people expend a substantial amount of time travelling, be it for business or pleasure. While not travelling, those who wish to do physical exercises have the opportunity to visit their local gymnasium or sports facility. While travelling, however, this is not such a simple matter. There is therefore a need for facilitating an exercise program for travelers, utilizing a lightweight, portable and simple exercise device. The present invention seeks to provide such a device, which is easily assembled, from a few component parts, easily disassembled and is very compact and portable. Furthermore it is usable for a wide range of exercises for the arms, legs, chest, back, stomach and posterior.

[0054] With reference to FIGS. 1 and 2, there is seen a demountable exercise device, generally referenced 100, in accordance with a preferred embodiment of the present invention. Device 100 is seen assembled from its component parts, comprising a central guide member, generally referenced 102, a pair of plunger members, generally referenced 112 and a flexible member or cord, referenced 106.

[0055] Referring now, additionally, to FIG. 3, there is seen, according to an embodiment of the present invention, central guide member 102, having an outer tubular casing referenced 104. Central guide member 102 has oppositely disposed guide tubes referenced 108 for demountable telescopic engagement with second end portions, referenced 110 (as disclosed hereinbelow with reference to FIG. 4) of plunger members 112 (FIG. 1). Alternative constructions to guide tubes 108 are disclosed hereinbelow (with reference to FIGS. 10 and 11).

[0056] Disposed within casing 104 is a depressible resilient means generally referenced 114, operative to permit mutual contraction of plunger members 112 (FIG. 1) in response to opposing axial forces applied thereto via first ends or handles referenced generally 116 thereof (as disclosed hereinbelow with reference to FIG. 4). Alternatives to resilient means 114 are further disclosed hereinbelow with reference to FIGS. 11 and 12.

[0057] Resilient means 114 is seen, according to another embodiment of the present invention, as two springs referenced 118 and 120, separated by spring separation discs referenced 122, centrally disposed within casing 104. Discs 122 may be fixably attached within casing 104, may be spring discs or may be attached one to the other. To reduce noise and friction between the interior of casing 104 and springs 118 and 120, either the interior of casing 104 or the outer surface of springs 118 and 120, or both, may be coated with a low friction polymer such as, for example, PTFE (polytetrafluoroethylene) or polypropylene, or surface treated with a suitable dry lubricant such as, for example, molybdenum disulfide.

[0058] Alternative to two springs 118 and 120, according to alternative embodiments of the present invention, there may be disposed within casing 104, a single helix spring (not shown), a resilient compressible polymer or foam rubber rod, a series of pairs of concave resilient washers disposed in an opposing arrangement, or a gas-filled resilient container or various combinations of these.

[0059] At each end within casing 104 there are cup-shaped washers referenced 124, disposed against each end of resilient means 114, thereby to retain resilient means 114 within casing 104 and to facilitate compression of resilient means 114 by second ends 110 of plungers 112 (as disclosed hereinbelow with reference to FIG. 4).

[0060] Referring now to FIGS. 4-6, there is seen plunger member 112 having a first end referenced 116 and a second end 110. According to a further embodiment of the present invention, there is a handle element, generally referenced 126, comprising a base portion referenced 128 and a handhold portion referenced 130, disposed at first end 116 of plunger 112. Base portion 128 is fixably attached to first end 116 of plunger 112, and has a groove referenced 132 formed in outer surface referenced 134 thereof to accommodated a flexible member or cord referenced 106 (FIG. 1). Hingably attached to outer surface 134 of base portion 128 by a hinge mechanism referenced 136 is handhold portion 130, having a curved outer surface referenced 138 to accommodate a hand of a user. To further accommodate the user's hand, ribs may be formed in curved outer surface 138. To secure handhold portion 130 in a closed position, hinge mechanism 136 is formed having a self-closing spring closure (not shown) or a securing latch (not shown). Alternative means for accommodating alternative forms of flexible member 106 are disclosed hereinbelow (with reference to FIGS. 8 and 9 referenced 152 and 172 respectively).

[0061] Referring now to FIG. 7, in accordance with an added embodiment of the present invention, there is seen flexible member or cord 136, which is formed as an endless loop. Cord 136 is formed having a plastic polymer covering referenced 138 either molded or braided about a central reinforcing core referenced 140 formed from steel wire, fiberglass filament or other suitable material. Cord 136 has handholds referenced 142 disposed on opposite sides thereof, which may be of a firm material such as hard rubber or plastic. Handholds 142 may be formed as simple cylindrical shapes or formed in accordance with molded handholds generally referenced 143, having molded ridges, referenced 144 as seen in “A”, to better accommodate the fingers of a user. In order to facilitate correctly positioning cord 136, end portions referenced 146 may be color-coded so as to accommodate these into each groove 132 of base portion 128 of each plunger 112 (FIG. 4).

[0062] The procedure for assembling exercise device 100, referring to FIGS. 1-7, is as follows: Plungers 112 are inserted into guide tubes 108 of central guide member 102. Thereafter, cord 136 is accommodated into grooves 132 of base portion 128 of each handle 126 and handhold portions 130 are closed against base portions 128. The procedure for disassembly is generally the reverse of that for assembly.

[0063] Referring now to FIG. 8, in accordance with a further embodiment of the present invention, an alternative flexible member generally referenced 150 is formed as a single length cord referenced 152 having attachment fasteners referenced 154 formed at each extremity referenced 156, fastened to attachment lugs referenced 158 formed on one plunger handle referenced 160. A mid-section referenced 162 of cord 152 is looped over groove referenced 132 formed in handle base 128, (as disclosed hereinabove with reference to FIGS. 4-6) of hand element 126.

[0064] Referring now to FIG. 9, in accordance with an additional embodiment of the present invention, resilient member generally referenced 170 is formed as a pair of cords referenced 172, each having attachment fasteners referenced 174 formed at each end thereof, which are fastened to attachment lugs referenced 176 formed on each plunger handle 180.

[0065] Referring now to FIGS. 10-12, as an alternative to guide tubes 108 formed on central guide member 102 (as disclosed hereinabove with reference to FIG. 3), there are seen collars generally referenced 200, each formed of two collar portions referenced 202 and 204. A fixed collar portion 202 is fixably attached to a casing referenced 206 and a closure collar portion referenced 204 is hingably attached to fixed portion 202 by a hinge generally referenced 211. Collars 200 function to connect plungers generally referenced 208 to each end of casing 206. Plungers 208 are generally formed in accordance with plungers 112 (as disclosed hereinabove with reference to FIGS. 4-6) except that at a second end thereof, generally referenced 210, there is formed a plunger head referenced 212 transverse to plunger shaft referenced 214. After each plunger head 212 together with stopper guide referenced 218 is inserted transversely into fixed collar portion 202, closure collar portion 204 is closed to retain plunger head 212 in position in casing 206 adjacent to cup washer 216 by engaging lugs referenced 207 of collar closure generally referenced 205 to recesses referenced 209 in fixed portion 202. Stopper guide 218 prevents each plunger head 212 from withdrawing from collar 200. Stopper guide 218 has a central orifice generally referenced 220 formed therein, having a diameter to permit axial movement of plunger shaft 214 therethrough, and not plunger head 212. There is seen in FIG. 11, mutual contraction of one of plungers 208 in response to opposing axial forces applied thereto via handles (not shown) at first ends thereof, causing plunger heads 212 to push against cup washers 216 thereby to cause depression of springs referenced 222. In FIG. 12, there is seen an external view of casing 206 covered with a softly resilient covering referenced 224, with collars 200 having closed collar portions 202 fixably attached to casing 206 and closure collar portion 204 in a closed position. To disassemble plungers 208 from casing 206, closure collar portion 204 is opened and plunger head 212 is moved transversely out of fixed collar portion 202.

[0066] Resilient means 114 (as disclosed hereinabove in relation to FIG. 3) are disposed within casing 104 in accordance with the preferred embodiment of the present invention. Referring now to FIGS. 13 and 14, in accordance with additional embodiments of the present invention, there are seen alternative arrangements of such resilient means. In FIG. 13, there are seen springs referenced 250, disposed external to each plunger shaft referenced 252, such that depression of plungers referenced generally 254 causes compression of springs 250. In FIG. 14, there is seen a spring referenced 260 disposed within casing referenced 262 (as disclosed hereinabove as reference 104 in FIG. 3) as well as springs 250 disposed external to plunger shafts 252. Springs 250 are added simply by withdrawing plungers 254 from casing 262 and guide tubes 264 and thereafter sliding springs 250 over each plunger shaft 252, followed by repositioning plungers 254 into guide tubes 264 and into casing 262. The effect of adding springs 250 to plunger shafts 252 is to require a greater compressive force to be applied to each plunger 254, where specific exercises necessitate this. The range of uses of exercise device 100 (FIG. 1) is thereby extended.

[0067] Referring now to FIG. 15, in accordance with another preferred embodiment of the present invention, there is seen a demountable exercise device generally referenced 300, comprising a single plunger referenced generally 302 and a guide member referenced generally 304. A handle element referenced 306 is fixably attached to a first end generally referenced 308 of plunger 302, and a similar handle element referenced 310 is fixably attached to a first end generally referenced 312 of guide member 304. Both handle elements 306 and 310 are formed generally in accordance with handle elements 126 (as disclosed hereinabove with reference to FIGS. 4-6). Second end generally referenced 314 of plunger 302 is slidingly inserted into a single guide tube referenced 316 formed at a second end generally referenced 318 of guide member 304. A flexible member or cord 320 is accommodated into grooves 322 of plunger handle element 306 and of guide member 304 handle element 310 (as disclosed hereinabove with reference to FIGS. 7-9).

[0068] In accordance with various embodiments of the present invention, demountable exercise device 300 may include any or all of the features of the embodiments disclosed hereinabove in relation to FIGS. 8-14 as well as the embodiments disclosed hereinbelow in relation to FIGS. 20-23.

[0069] Referring now to FIGS. 16-19, there is seen, according to an additional embodiment of the present invention, an application for demountable exercise device 400, whereby device 400 is demountably attached transversely to a chair or stool leg referenced 402. Attachment is achieved by wrapping stool leg 402 with one or more rubber pads referenced 404 and affixing a pair of rotatably connected clamping bands referenced 406 and 408, respectively to exercise device 400 and to stool leg 402. In order to carry out leg exercises, as seen in FIG. 17, by way of example, cord 136 (as disclosed hereinabove with reference to FIG. 1) may have an ankle attachment strap referenced 410 and ankle fastener referenced 412, attached to cord 136 by a fastener referenced 414. As indicated in FIG. 18, an alternative cord and strap arrangement generally referenced 420 may be utilized for attachment to the user's ankle. Ankle strap 422 has ankle adjustment fastener referenced 424 for fastening to the user's ankle, and length adjustment fastener 426 to set a preselected tension to cord 428.

[0070] In order to carry out various leg exercises, the user sits, for example, on a stool (not shown) with exercise device 400 fastened to stool leg 402. Ankle strap 410 is fastened to ankle 442 of the user. To carry out this exercise, the user raises the leg from a position generally referenced 444 to a position generally referenced 446 and returns to position 444. This movement is repeated as required by the user. As the leg moves as indicated by arrow 446, plungers 448 (FIG. 17) or plungers 450 (FIG. 18) are depressed against a resilient spring or springs (not shown) to provide resistance to the movement and then allowed to decompress.

[0071] Referring now to FIGS. 20 and 21, in accordance with a further preferred embodiment of the present invention, there is seen a pair of demountable exercise apparatus generally referenced 500 aligned relative to guide tubes referenced 516 of a guide member referenced 502 of a demountable exercise device (referenced 100 as related hereinabove in relation to FIGS. 1-3) as indicated by arrows 504. Each exercise apparatus 500 comprises an outer cylindrical casing or housing referenced 506, within which there is rotatably-mounted a retractable spool (not shown). A cylindrical axial mounting opening, referenced 508 is formed through housing 506 and a retractable spool (not shown). An elongate flexible member or cord referenced 510 is fixably attached at a first end thereof to the retractable spool and is resiliently coiled thereabout. Elongate flexible member or cord 510 projects beyond housing 506, through an orifice referenced 512 and has a handhold referenced 514 formed at a second end thereof.

[0072] In FIG. 21, there are seen exercise apparatus 500 demountably attached to a demountable multi-purpose exercise device 100 with cylindrical axial mounting openings 508 fitted over guide tubes 516 to guide member 502 and locked, in position to guide tubes 516 by fasteners (not shown). Thereafter two elongate plunger members referenced 518 are inserted into guide tubes 516 and flexible member or cord referenced 520 is attached to handle elements referenced 522 (generally as disclosed hereinabove in relation to FIGS. 1-6).

[0073] Referring now to FIG. 22, there is seen a single exercise apparatus generally referenced 550, having disposed on casing 552, a brake element referenced 554 thereby to apply variable resistance to rotation of a retractable spool member (not shown) therein. This applied variable resistance provides for variable force needed to withdraw cord 520 from casing 552 through opening referenced 556, by pulling on handhold 514 (as seen in FIGS. 20 and 21). Moving brake element 554 in the directions indicated by arrow 560 provides a greater or lesser resistance to withdrawing cord 520.

[0074] Referring now to FIG. 23, there is illustrated, as an example, a rowing exercise generally referenced 560 carried out using a pair of exercise members 500 mounted on a demountable multi-purpose exercise device 100 (as disclosed hereinabove in relation to FIGS. 20-22).

[0075] Alternative exercises are carried out using a pair of exercise apparatus 500 in conjunction with a simultaneous depression of elongate plunger members 518. For example, a variation of the rowing exercise 560 (disclosed hereinabove in relation to FIG. 23) may be performed with handholds 514 fastened over the feet or to a fixed or stationary object. Demountable multi-purpose exercise device 100 is drawn towards the user while the user simultaneously depresses handle elements 522 of elongate plunger members 518.

[0076] It will be appreciated by persons skilled in the art that the present invention is not limited to the exercise examples disclosed hereinabove, but may be utilized in a multitude of exercises using combinations of the various components, apparatus, members and elements of the present invention.

[0077] It will be appreciated by persons skilled in the art that the present invention is not limited by the drawings and description hereinabove presented. Rather, the invention is defined solely by the claims that follow. 

The invention claimed is:
 1. A demountable multi-purpose exercise device including a) a pair of elongate plunger members, each having a first end portion and a second end portion; b) a central guide member having a pair of oppositely disposed portions for demountable telescopic engagement with said second end portions of said pair of elongate plunger members; and c) depressible resilient means disposed between said pair of elongate plunger members and said central guide member, operative to permit mutual contraction of said plunger members in response to opposing axial forces of at least a predetermined magnitude applied thereto via said first ends thereof.
 2. A demountable multi-purpose exercise device according to claim 1, also including an elongate flexible member operative to be longitudinally looped about the remainder of said exercise device in engagement with said first end portions of said pair of elongate plunger members, and configured to be of a length so as to retain said pair of plunger members in engagement with said central guide member.
 3. A demountable multi-purpose exercise device according to claim 2, also including means for selectably fastening said elongate flexible member to said first end portions of said pair of elongate plunger members.
 4. A demountable multi-purpose exercise device according to claim 2, wherein said flexible member is formed as a continuous, endless loop.
 5. A demountable multi-purpose exercise device according to claim 2, wherein said elongate flexible member is formed as a pair of elongate flexible elements.
 6. A demountable multi-purpose exercise device according to claim 2, wherein said elongate flexible member is arranged to be demountably engaged to said first end portions of said plunger members such that, applying a transverse force to said flexible member, said elongate flexible member is operative to apply opposing axial forces to said first end portions of said elongate plunger members to permit mutual contraction of said plunger members.
 7. A demountable multi-purpose exercise device according to claim 2, wherein said elongate flexible member includes at least one handhold disposed along a portion of said elongate flexible member, and affixed thereto, thereby to provide a means for gripping said elongate flexible member.
 8. A demountable multi-purpose exercise device according to claim 2, wherein said elongate flexible member includes attached thereto an extended elongate flexible element so as to attach said extended elongate flexible element to a user's limbs.
 9. A demountable multi-purpose exercise device according to claim 1, wherein said first end portions of said elongate plunger members have handle elements disposed at said first end portions thereof, so as to facilitate a user applying opposing axial forces to said first end portions of said elongate plunger members.
 10. A demountable multi-purpose exercise device according to claim 1, wherein said depressible resilient means includes at least one resilient means selected from the group comprising: a) at least one helical spring; b) at least one pair of concave resilient washers disposed in an opposing arrangement; c) resilient foam polymer material; and d) gas filled resilient container.
 11. A demountable multi-purpose exercise device according to claim 1, wherein said depressible resilient means is disposed in at least one arrangement selected from the group comprising: a) within at least one of said plunger members; b) within said guide member; c) external to at least one of said plunger members; and d) external to said guide member.
 12. A demountable multi-purpose exercise device including a) an elongate plunger member, having a first end portion and a second end portion; b) a guide member having a first end portion and a second end portion oppositely disposed such that said second end portion is formed for demountable telescopic engagement with said second end portion of said elongate plunger member; and c) depressible resilient means provided between said elongate plunger member and said guide member, operative to permit mutual contraction of said elongate plunger member and said guide member in response to opposing axial forces applied thereto via said first end portion of said plunger member and said first end portion of said guide member.
 13. A demountable multi-purpose exercise device according to claim 12, also including an elongate flexible member operative to be longitudinally looped about the remainder of said exercise device in engagement with said first end portion of said elongate plunger member and said guide member, and configured to be of a length so as to retain said pair of plunger members in engagement with said central guide member.
 14. A demountable multi-purpose exercise device according to claim 13, also including means for selectably fastening said elongate flexible member to said first end portion of said elongate plunger member and said central guide member.
 15. A demountable multi-purpose exercise device according to claim 13, wherein said elongate flexible member is formed as a continuous, endless loop.
 16. A demountable multi-purpose exercise device according to claim 13, wherein said elongate flexible member is formed as a pair of flexible elements.
 17. A demountable multi-purpose exercise device according to claim 13, wherein said elongate flexible member is arranged to be demountably engaged to said first end portion of said elongate plunger member and said first end portion of said guide member such that, applying a transverse force to said elongate flexible member, said elongate flexible member is operative to apply opposing axial forces to said first end portion of said elongate plunger member and to said first end portion of said guide member to permit mutual contraction of said elongate plunger member and said guide member.
 18. A demountable multi-purpose exercise device according to claim 12, wherein said elongate flexible member includes at least one handhold disposed along a portion of said elongate flexible member, and affixed thereto, thereby to provide a means for gripping said elongate flexible member.
 19. A demountable multi-purpose exercise device according to claim 13, wherein said elongate flexible member includes attached thereto an extended elongate flexible element so as to attach said extended elongate flexible element to a user's limbs.
 20. A demountable multi-purpose exercise device according to claim 12, wherein said first end portion of said elongate plunger member and said first end portion of said guide member have handle elements disposed at said first end portions of said elongate plunger member and said first end portion of said guide member, so as to facilitate a user applying opposing axial forces to said first end of said elongate plunger member and to said first end portion of said guide member.
 21. A demountable multi-purpose exercise device according to claim 12, wherein said depressible resilient means includes at least one resilient means selected from the group comprising: a) at least one helical spring; b) at least one pair of concave resilient washers disposed in an opposing arrangement; c) resilient foam polymer material; and d) gas filled resilient container.
 22. A demountable multi-purpose exercise device according to claim 12, wherein said depressible resilient means is disposed in at least one arrangement selected from the group comprising: a) within said elongate plunger; b) within said guide member; c) external to said elongate plunger; and d) external to said guide member.
 23. For use with a demountable multi-purpose exercise device which includes a pair of elongate plunger members and a guide member arranged for mutual, relative, resilient contraction along a common axis, exercise apparatus which includes: a) at least one retractable spool member rotationally mounted within a substantially cylindrical casing having a cylindrical axial mounting opening formed therethrough; and b) at least one elongate flexible member fixably attached by a first end thereof to said at least one spool member and arranged to be resiliently coiled thereabout and adapted to be uncoiled in response to a force greater than a resistance force applied thereto via said spool member, said at least one retractable spool member operative to recoil said at least one elongate flexible member thereabout in the absence of a force greater than the resistance force.
 24. Exercise apparatus according to claim 23 wherein at least one of said exercise apparatus is demountably disposed on said guide member.
 25. Exercise apparatus according to claim 23 wherein said exercise apparatus includes a brake element disposed thereon so as to apply a preselected resistance force to said retractable spool member. 